bit64
v0.9-4

A S3 class for vectors of 64bit integers

Package 'bit64' provides serializable S3 atomic 64bit (signed) integers
that can be used in vectors, matrices, arrays and data.frames. Methods are
available for coercion from and to logicals, integers, doubles, characters
and factors as well as many elementwise and summary functions. Many fast
algorithmic operations such as 'match' and 'order' support interactive data
exploration and manipulation and optionally leverage caching.